Hammer-drill.



Patented Aug. 30, 1910.

MENTS-'SHEET 1.

Ilm!- A. H. TAYLOR.

v HAMMER DRILL. APPLIOATION FILED sBP'14t.12,19oa.

I @n/wies.

' A. H. TAYLOR.

HAMMER DRILL. APPENATIQN FILED s EPT.12, 190e.

Patented Aug. 30, 1910.

z SHEETS-snafu.

position shownnin Fig.

ALBEBJT H.' TAYLOR, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND y COMPANY, OF NEW YORK, N. Y., A, CORPORATION '0F NEW JERSEY.

HAMMER-DRILL.

' Specification of Letters Patent. Patented Aug, 30, 1910.

Application filed September 12, 1903. Serial No. 452,704.

To all w'w'm it may concern:

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States, and resident of Easton, in the county of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Hammer-Drills, of which the following is a specification.

This invention consists in certain improvements in that class of pneumatic toolsknown as hammer drills in which an air power feed is provided for forcing the tool forward and holding it in its working position; a manually operated controlling device, such, for instance, as a throttle valve, loeing4 provided for controlling the admission lof air from the supply to the air feed, from the air feed to the hammer, from the air feed to atmosphere and from the supply to t-he hammer at. pleasure for facilitating the operation and control of the hammer. i l 4 Practical embodiments of my invention are represented in the accompanying drawings in which, i f Figure l represents a portion of an air feed hannner drilll partially in side elevation and partially in longitudinal central section, with my improvements applied thereto. the controlling valve being in position to closecommunication from the air suppl).7 both to the air feed and hammer, the ail-'feed and the hannner both being in open con-uuunication with atmosphere through said controlling valve. Figs. 2, 2E and l are detail sections showing the location and relation of the several ports whenthevalve is in the position shown in Fig. l-. f Fig. 5 is a detail vien' partiallyY in side elevation and partially in longitudinal central section, the' controlling valve. being in position to open the air suppl)v to the air'feed and the air feed to the hannner, the communication het-ween the air feed 'and atmosphere and the hammer andV atmosphere through the valve being closed. Figs. G, and S are detail sections showing the location and relation of the severalvports when the'valveis in the Fig. E) is a vien'y similar to Fig. 5, with the'controlling valve shoivn'in vposition `to close communication li'etweenA the air feed and hammer, between the air supply and air `feed and he'tv'vieen theV air supply and hannner. Figs. 10, l1 and a view similar to Figs. 5 and 9, with the controlling valve in position to close communication between the air feed and hammer and .to open cominu'nication` from the' air suppli7 to both the airfeed "and the hamnier. Figs. 14, l'and 16 are detail sections showing the location and relation of the several ports when thevalve is in the position shown in Fig. 4. Fig. 17 is a View similar to Fig. l, With the exception that the air feed piston is shown attached to the head hlocl; instead of ther air feed cylinder. Fig.

18 is a partial inverted plan' View of the operating handle for the controlling valve.

Fig 19 is aside View of the controlling valve. Fig. 20 is a' detail longitudinal cen-V Aits piston by 4. v,In theforni shown in Fig. 1,- the air feed. cvlinder isl attached directly to the head block and the `air feed piston rod extends vrearwardly through 'the free end of the air feed cylinder so as to forni a rear support for the ltool. In the forni shown in Fig. 17', .the air-.feed piston is attached Cirectlyv to the' head block and the air feed cylinder is provided with a rear extension 5 which forms a rear support for the tool. The head block 2 of the tool is provided with 'a hole therethrough a portion of which forms a tapered seatofor the tapered portion of controlling valve. The cylindrical portion 8.of the said controlling-valve at the endof its tapered portion is provided ivith an angi'ilarportion ,9 on which is fixed the .valve operating handle 10. .Y This valve operating handle is provided on its inner face, adjacent to the outer face of the, head `block, ivithvfour shallow recesses 11, `12, i123,V 14, arranged. to :respectively rcceiveand retain againstY unintentional reinoval,.the v.tapered endfofa spring actuated sliding pin 15j mounted inthehead block 2. to the' head block '2, byA a -collarll' having a Ascrew `threaded' engagement ywith the hole in the head block beyond its tapered seat (S. The controlling valve isV provided [with a An; air supply lpipe 16 is secured i valve seat 6 to the air feed chamber 23y and a port 24 is located in the controlling valve, one branch of Which port may be brought into 4communication With the port 22 when the valve is in one of its rotary positions, the other branch of which port 2a leads to external atmosphere through the end of the said valve. A series of gradually enlarging ports 26 are located in the same transverse plane and leadfrom different points on the valve seat 6 to the air port 27 in the plane of the ports 26, leads from the valve seat 6 into the hammer chamber 28. A port 29 in the controlling valve is arranged to open communication from the air supply to the air feed through the ports 26, When the valve is in one of its rotary positions, and from the air supply to the hammer through the port 27 VWhen in another of its rotary positions. A port 80 leads from the valve seat 6 to the air feed chamber 23 and a port 31 in the controlling valve is arranged to open communication from the air supply to the air feed through the port 30, when the valve is in one o its rotary positions. Another port 32'in the controlling valve is arranged to open communication directly from the air feed to the hammer through the ports 30 and 27 Whenthe controlling valve is in one of its rotary positions.

In operation, supposing the parts to be inthe position shown in Figs. 1, 2, 3 and 4, the air supply will be shut olf from both the air feediand the hammer; the air feed chamber 28 being open to `atmosphere through 'the ports 22 and 24, and the .hammer cham ber 28 being open to atmosphere through the ports 20, 21 and 19, as clearly 2. When the parts are in this position, the handle Will be yieldingly held against unintentional displacement by the engagement of the spring actuated pin 15 with the recess 11 in the inner face of the handle 10. When it is desired to start the tool upon its work,

the handle, and thereby the controlling valve, is swung into the position shown 1n Figs. y5, 6, 7` and 8. The parts will be yieldingly held in this position against unintentional displacement by the engagement of y the spring actuated pin 15 with the recess l2. As the valve isl moved intoY this position, the air supply Will be. gradually opened into `the air feed chamber by the feed chamber 28. A

shown in Fig.A

'pressure in the air feed chamber will be somewhat relieved by its escape through the hammer. The next step in the operation is to move the controlling valve into the posi tion shown in Figs. 9, 10, 11 and 12: The valve is yieldingly vheld in this position against unintentional displacementlby the engagement of the spring actuated pin 15 with the recess 13, in the inner face of the handle 10. Vhen the parts are in this position communication to atmosphere through the valve from the air feed chamber 23 and hammer chamber 28, is closed. Also cominunication from the air feed chamber to the hammer chamber through the ports 30,

32 and 27 isfclosed; also communication from the air 'supply lto the air feed through the ports 26V and 29 is closed. Communication, however, 1s established between the air supply and the 'air feed chamber 23 through the ports 30 and 31, as clearly shown in Fig. 11. This will serve to hold the tool up to its Work with fullair pressure. The last step in the operation of the tool is to move the parts into the position shown in Figs. 18, 14, 15 and 16. The parts Will be yieldingly held against unintentional displacementgby the' engagement of the spring actuated pin 15 with the recess 14 in .the inner face of the handle 10. Communication from the air feed chamber 23'and hammer chamber 28 to atmosphere throtigh the valve is still closed. Open communication is established from the air supply to'the air feed chamber 23 and from the air supply directly to the hammer lchamber 28. This is accomplished by opening the port 31 to the port 30 andthe port 29- to the po. t 27, as clearly shown in Figs. 15 and 16.

vIt will thus be seen that by the construction, form and arrangement of the several arts as herein shown and described, I am enabled'to feed the hammer up to its Work and sta-rt the operation thereof, under a lesser pressure' than the full pressure of the motive fluid. This is very advantageous for the reason that it is not desirable to start the operation of the tool'with vthe full fluid pressure fed to both the air feed chamber and the hammer. After the hammer has been started on. its Work, the centrolling valve may be moved into position directly ydeparting from thespY to open the pressure fluid directly to both the sir feed and the hammer.

While I have shown and described this- Vsame may be used in vconnection 4with'any duid pressure ffed'and operated tool Without u and'seope ofnriy invention.V

ifvlhatl claim is: 1

l. A pressure fluidA toolffluid: pressure feeding means therefor, fand a controlling device having ports so arranged that when the device is in one position itV closes communication from the pressure fluid Asupply to the feeding means and the tool and opens 4 communication from the feeding means and tool to atmosphere. y

2. pressure fluid tool, fluid pressure vfeeding means therefor-,and la controlling valve located between the tool and feeding means having ports so arranged that when the valve is in one position it closes communication from the pressure fluid supply to the feeding means and the tool and opens communication from the feeding means and -tool to atmosphere.

3, in an air feed hammer` drill, a head block, an air supply, an air feeding means comprising a cylinder and its piston, and a manually operated valve in the head block having ports so arranged that ivhen the valve is in one position it closes communication from the air supply to the feeding means and the hammer and opens commumcation from the feeding meansand hammer to atmosphere.

#hat pressure fluid tool, fluid pressure recdnig Vmeans therefor', and a controlling i y device having ports so arranged thatwhen the device is in one position it opens communication from the pressure fluid supplyv to the tool-through the feeding means and closes direct communication ,between the pressure fluid supply and the tool; and when in another position it opens direct oommuni-l cation freundie pressure fluid supply to thefeeding means and 'to the tool.

A pressure fluid tool, 'iuid pressure feedingmeans therefor, and a controlling valve located between the tool and feeding means having ports so arranged that when tlv .'alveis in one Aposition it opens communication from the pressure fluid supply to the lool through the feeding means and closes direct communication between` the pressure fluid supply and the tool; and when in another position it opens direct connnunioation from the pressure fluid supply to the feeding means and to the tool.

6. ln an air feed hammer drill, a head block, an air supply, an air. feeding means comprising a cylinder and its piston, and a manually operated valve inthe head block having ports so arranged that when the t. vfeeding lmeans therefor,'and a cont-rolling ldevice having'ports so 'arranged that when valve is in one position it opens communication from the air supply to the hammer through the feeding means and closes direct communication between the air supply and hammer; and When iu another position it opensdirect-v communication..from the, au' supplyL to the-feedingniieiixis and to the hammer.

" A: 'pressure luidftool, pressure the device is in' one position it opens .conimunication from the pressure fluid ,supply to the tooljthrough'the feeding means `and closes direct coinrru-mication` between the pressure fluid supply. andthe tool and when in another position itfcloses communication between'the tool andboth' the feedingrmeans and pressure fluid supply and opens coinniunicati'on between theY pressure fluid supply and the jfeediiig'n'iean's-f; 1' l 8. A 'pressure-fluid tool, kfluid pressure;

feeding meanstherefor,` and; a controlling valve located betweenthe tool-and feeding means having ports so arranged that when the valve in'one *position* it topens communication from the pressure fluid supply. to the tool' through the feeding-means-1and 'closes' direct communication 'between .fthe

pressure supply fand the tool gif-and Ti'vhen in' another positionit'clos'es communication "between the tool i a'ndff both fthe feed-- ing meansvandjpressure liu'idfj'supply and opens' communication 'between the :pressure fluid supply and thel feeding means. '1

9. In anA air feedihammer drill, unl-read block# .im 'all' Supply', andi-lill "feeding I'neans?" Comprising ajvcylin'der an'dwits fpistomand a manually operated 'i'alve liii-thc head 'block having ports so;arrangedV tl'uitwhen-thc- Valve, is in Vone, position fit' 'optingcommunivcation, f rlniifvthze supplyto thehanimer throufrh th c, l Afeeding means ahdjcl sejdirect communication betiveeii the ai ul'iplyand the han'nn'er; andgiulienffiiranother position it closes communication'from the hammer to b'otli the feeding means' andflhe air supply ply to the feeding means. -l L 10.1 pressure fluid toolftloid press-um feeding 1neans tlierefor,and.' a controlling device hafing port so ranged that ruhen'v the devicefis one p'o.V n vit openshcommunication from the pressure fliidfsupply and opens communication yfrom the Vair :sup-

.to the tool through the feeding means and closes direct communication between the pressure fluid supply and the tool-7 when in another position it closes `communication between the tool and bot-hv the feeding means and pressure fluid supply and'opeus communication from the pressure fluid lsupply tothe feeding means; and when in a third position, it opens direct communication from the pressure fluid supply to both the feeding means and the tool.

closes communication between theA hammer pressure fluid supply to the feeding means 50.

l1. A pressure fluid tool, fluid pressurex feeding means therefor, and a controlling ralrc located between the tool and feeding means having ports so arranged that when the valve is in one position it openscommunication from the pressure fluid supply to the tool through the feeding means and closes direct communication between the pressure fluid supply and the tool; when in another position it closes communication between the tooland both the feeding means and pressure fluid supply and opens communication from the pressure fluid supply to the feeding means; and when in a third position it opens direct communication from the pressure fluid supply to both the feeding means and the tool.

12. In an air feed hammer drill, ahead block` an air supply, an air feeding means comprising a cylinder and its piston, and a manually operated valve in the head block having ports so arranged that when' the valve is in one position it opens communiA cation from the air supply to thelhammer through the feeding means and closes direct communication between the air supply and the hammer; when inanother position it andiboth the feeding means and air supply and opens communication from the air sup# ply to the feeding means; and when in a third position it opens direct communication from the air supply to both the feeding means and the hammer.

13. A pressure fluid tool, fluid pressure feeding means therefor, and-a controlling device having ports so arranged that when the device is in one' position it opens communication from the pressure lluidrsupply to the tool through the feeding means and closes` direct communication between the pressure fluid supply and the tool; when in a second position it closes communication between the tool and both the feeding means and pressure fluid supply and opens communication from the pressure fluid supply to the feeding means; when in a third position it opens direct communication from the and the tool; and when in a fourth position it closes communication between the pressure fluid supply, the feeding means and the day of August tool and opens communication from the feeding means and the tool to atmosphere.

14. A pressure fluid tool, vfluid pressure feedinor means therefor, and a controlling valve Iocated between the tool and feeding means having ports so arranged that when the valve is in one position it opens com@ munication vfrom the pressure Huid supply to the tool through the feedingmeans and closes direct communication between the pressure fluid supply and the tool; when in a second position it closes-communication between the tool and both the feeding means Aand pressure fluid supply. andA opens communication from the pressure liuid supply tothe feeding means; when ina third position it opens directcommunication from the 'pressure fluid supply to the feeding means and the tool; and when in a fourth position it closes communication between the' pressure fluid supply, the feeding means and the tool and opens communication from the feeding means and the tool to atmosphere.

15. In an air feed hammer drill, a head block, an air supply, an air feeding means comprising a cylinder` and its piston, and a manually operated valve in the head block having ports so arranged that when the valve is in one position it openscommunication from the air supply to the hammer' through the feeding means and closes direct communication between the airY supply'and the hammer; when in -a second position it closes communicationfromthe hammer to both the feeding means and the air supply and opens communication from the air supply to the feeding means; when in a third position it opens direct communication from the air supply to both the feeding means and the hammer; and when in a fourth position it closes communication between the hammer, the feeding means and the air supply and opens communication from the hammer and feeding means to atmosphere.

In testimony, that I claim' the foregoing as my invention, I have signed my name in presence of two witnesses, this twenty-first- ALBERT H. TAYLOR. Witnesses I". Geenen BARRY, HENRY THIEME. 

